If AB is a chord of a circle with center O, and angle AOB = 60°, then the length of the arc AB (radius = r) is:
Show answer & explanation
Correct answer: B
Explanation
Given:
Radius = r
∠AOB = 60°
By the formula:
Arc length = (θ/360) × 2πr
Arc AB = (60/360) × 2πr
= (1/6) × 2πr
= πr/3
Length of arc AB = πr/3